nope it is not a feature to stop accidental trig removal.
it is very responsive and always turn off a trig when the A4 is not receiving a clock. every time without fail.
but when it is receiving a clock there is a big chance of failure to remove a trig.
just like you can loose your undo if you are receiving a midi clock.
Projectile. when using Maschine there is an option under for MIDI Clock, it turns it off and on. i don’t use Machine stand alone anymore though.
I switched to Ableton.